From Wikitravel

Please remember that the result of any Wikitravel article will be the consensus view of all the contributors to that article.

Why consensus occurs

When you edit an article you impose your view on it. But the person after you imposes theirs. Only that which all the contributors can accept ends up being left in the article. As a result most articles will end up having a neutral point of view - that is a view that all contributors accept - in short - consensus.

Consensus is not a policy; it is a fact of life on a Wiki. Because anyone can edit, anyone can change what is already there, or write something new or different. Then somebody else can come along and change it again, take things away, move things around or even change it all back to what it was to start with, perhaps even deleting the article entirely.

Disagreements

Always remember that whatever you write will be changed by the next person to contribute. The more controversial or disagreeable your writing, the more likely it will be changed. You cannot stop this happening. If the views of the various authors of an article disagree too much an edit war will ensue. Radical or controversial changes should always be discussed - first.

If you do plunge forward and make significant changes to an article, give a reason for it. Use the summary line on the edit form, and, if you feel you are making changes someone else might oppose, also put an explanation on the talk page.

Unless it is clearly vandalism or graffiti, simply reverting somebody else's changes will normally be unhelpful. If you disagree with the changes that have been made, try to find a mid point between your position and the other person's; something you can both agree on.